Gear box



FIG. 1 is a front left perspective view of a gear box showing a first embodiment of my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front left perspective view of a gear box showing a second embodiment of my new design;

FIG. 9 is a right side view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof:

FIG. 12 is a left side view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom view thereof.

The portions depicted in broken lines are environment and form no part of the claimed design. 

CLAIM The ornamental design for a gear box, as shown and described. 